Genetic Mechanism Protects Bacterial Communities from Viral Threats
Discovery of a Protective Genetic Mechanism Researchers at the Marine Biological Laboratory (MBL) have uncovered a genetic mechanism that shields bacterial communities, such as those forming pink berries in salt marshes, from viral threats. Published in the Proceedings of the National Academy of Sciences, the study sheds light on how these communal bacteria defend against diseases, offering insights into the evolution of single-celled organisms into complex multicellular structures. Understanding the Genetic Defense System The study, led by Lizzy Wilbanks, a microbiologist at the University of California, Santa Barbara, focused on Thiohalocapsa PSB1 bacteria found in pink berries. These structures consist of genetically similar cells densely packed together, making them vulnerable to viral infections. Through genetic analysis, researchers discovered a genetic mechanism known as diversity-generating retroelements (DGRs), which introduce new genetic variation into...